LOS ANGELES -- Junior Ally Carda struck out five in a complete-game, two-hit shutout on Saturday, while sophomore Brittany Moeai drove in the contest's only run with an RBI single in the fourth, as the third-ranked Bruins defeated sixth-ranked Arizona 1-0 in the Pac-12 opener at Easton Stadium.

The Bruins improve to 24-1 overall, while the Wildcats fall to 23-4.

Carda moved to 14-1 on the season, giving up four walks in her sixth complete-game shutout of the year. She had 1-2-3 innings in the third and fifth. The Bruins had five hits at the plate, as sophomore Mysha Sataraka recorded a pair.

After three scoreless innings, the Wildcats left the bases loaded in the top of the fourth. Chelsea Suitos singled to open the inning and moved to second one out later on a stolen base. Walks to Chelsea Goodacre and Kelsey Rodriguez loaded the bases for Arizona, but Carda retired Lauren Young on a foul out to Moeai behind the plate and struck out Mo Mercado to end the threat.

The Bruins immediately used that momentum in the bottom of the fourth to score the game's lone run. With one out, Sataraka doubled to right and senior Jessica Hall walked. With junior Jessica Amaral running for Sataraka at second, Moeai lined a single up the middle, with Amaral sliding in safely before the throw got home to put the Bruins up 1-0.

Arizona had another chance to score in the sixth, but junior Gracie Goulder made the defensive play of the game to keep the visitors off the scoreboard. With one out, Kellie Fox walked and was pinch-run for by Eva Watson, who stole second. After a Goodacre grounder to Goulder moved Watson to third, Rodriguez tapped another ball to the UCLA second baseman. But Goulder dove to her right, got up and threw out Rodriguez for the final out of the inning.

In the seventh, the Wildcats had runners at second and first with one out, but Carda got out of another jam to finish the shutout. Courtney Rodriguez flied out to center and Hallie Wilson grounded out to second to end the game.